2NH4+ → N2H5+ + 3H+ + 2e−
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- Oxidation of ammonium ion
- 2NH4+Ammonium ionN2H5+Hydrazinium ion + 3H+Hydrogen ion + 2e−Electron⟶
Oxidation of ammonium ion yields hydrazinium ion, hydrogen ion (Other reactions are here). This reaction is an oxidation-reduction reaction and is classified as follows:
Table of contents
Reaction data
Chemical equation
- Oxidation of ammonium ion
- 2NH4+Ammonium ionN2H5+Hydrazinium ion + 3H+Hydrogen ion + 2e−Electron⟶
General equation
- Oxidation of oxidizable species
- ReactantReducing agent ⟶ ProductOxidation product + e−
Oxidation state of each atom
- Oxidation of ammonium ion
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| NH4+ | Ammonium ion | 2 | Reducing | – |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| N2H5+ | Hydrazinium ion | 1 | Oxidized | – |
| H+ | Hydrogen ion | 3 | – | – |
| e− | Electron | 2 | – | Electron |
Thermodynamic changes
Changes in standard condition
- Oxidation of ammonium ion◆
ΔrG 241.1 kJ/mol K 0.58 × 10−42 pK 42.24 - 2NH4+Un-ionized aqueous solutionN2H5+Un-ionized aqueous solution + 3H+Un-ionized aqueous solution + 2e−⟶
| Standard enthalpy of reaction ΔrH° kJ · mol−1 | Standard Gibbs energy of reaction ΔrG° kJ · mol−1 | Standard entropy of reaction ΔrS° J · K−1 · mol−1 | Standard heat capacity of reaction at constant pressure ΔrCp° J · K−1 · mol−1 | |
|---|---|---|---|---|
per 1 mol of Equation | 257.5 | 241.1 | −76 | −89.5 |
per 1 mol of Ammonium ion | 128.8 | 120.5 | −38 | −44.8 |
per 1 mol of Hydrazinium ion | 257.5 | 241.1 | −76 | −89.5 |
per 1 mol of Hydrogen ion | 85.83 | 80.37 | −25 | −29.8 |
per 1 mol of Electron | 128.8 | 120.5 | −38 | −44.8 |
Thermodynamic data of reactants
| Chemical formula | Standard enthalpy of formation ΔfH° kJ · mol−1 | Standard Gibbs energy of formation ΔfG° kJ · mol−1 | Standard molar entropy S° J · K−1 · mol−1 | Standard molar heat capacity at constant pressure Cp° J · K−1 · mol−1 |
|---|---|---|---|---|
| NH4+ (ao) | -132.51[1] | -79.31[1] | 113.4[1] | 79.9[1] |
* (ao):Un-ionized aqueous solution
Thermodynamic data of products
| Chemical formula | Standard enthalpy of formation ΔfH° kJ · mol−1 | Standard Gibbs energy of formation ΔfG° kJ · mol−1 | Standard molar entropy S° J · K−1 · mol−1 | Standard molar heat capacity at constant pressure Cp° J · K−1 · mol−1 |
|---|---|---|---|---|
| N2H5+ (ao) | -7.5[1] | 82.5[1] | 151[1] | 70.3[1] |
| H+ (g) | 1536.202[1] | – | – | – |
| H+ (ao) | 0[1] | 0[1] | 0[1] | 0[1] |
| e− | – | – | – | – |
* (ao):Un-ionized aqueous solution, (g):Gas
References
List of references
- 1Janiel J. Reed (1989)The NBS Tables of Chemical Thermodynamic Properties: Selected Values for Inorganic and C1 and C2 Organic Substances in SI UnitsNational Institute of Standards and Technology (NIST)
- ^ ΔfH°, -132.51 kJ · mol−1
- ^ ΔfG°, -79.31 kJ · mol−1
- ^ S°, 113.4 J · K−1 · mol−1
- ^ Cp°, 79.9 J · K−1 · mol−1
- ^ ΔfH°, -7.5 kJ · mol−1
- ^ ΔfG°, 82.5 kJ · mol−1
- ^ S°, 151. J · K−1 · mol−1
- ^ Cp°, 70.3 J · K−1 · mol−1
- ^ ΔfH°, 1536.202 kJ · mol−1
- ^ ΔfH°, 0 kJ · mol−1
- ^ ΔfG°, 0 kJ · mol−1
- ^ S°, 0 J · K−1 · mol−1
- ^ Cp°, 0 J · K−1 · mol−1